void ContentListView_SizeChanged(object sender, SizeChangedEventArgs e)
{
int index = (int)ContentListView.GetValue(ContentListViewChangeViewRequestProperty);
if (index >= 0 && e.NewSize.Height > 10 && ContentListView.Items.Count > 0 && index < ContentListView.Items.Count)
{
ContentListView.UpdateLayout();
ContentListView.ScrollIntoView(ViewModel.Contents[index], ScrollIntoViewAlignment.Leading);
index = -1;
ContentListView.SizeChanged -= ContentListView_SizeChanged;
}
}
void ChangeView(int page, int line = -1)
{
if (line >= 0)
{
ContentListView.UpdateLayout();
if (ContentListView.Items.Count == 0)
{
ContentListView.SetValue(ContentListViewChangeViewRequestProperty, line);
ContentListView.SizeChanged += ContentListView_SizeChanged;
}
else if (line < ContentListView.Items.Count)
{
ContentListView.ScrollIntoView(ViewModel.Contents[line], ScrollIntoViewAlignment.Leading);
}
}
}